From bf370041946613c03ab11ff8c3864e549c053fdc Mon Sep 17 00:00:00 2001
From: Matthias Fax <mat@fax.fyi>
Date: Tue, 15 Jul 2025 15:15:09 +0200
Subject: [PATCH] feat: ignore mouse-over-sky autofocus

This disables the mouse-based autofocus to focus on the sky, retaining the existing focal points under the horizon.
---
 Shaders/CinematicDOF.fx | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/Shaders/CinematicDOF.fx b/Shaders/CinematicDOF.fx
index 54c8c2a..ba32b88 100644
--- a/Shaders/CinematicDOF.fx
+++ b/Shaders/CinematicDOF.fx
@@ -1161,9 +1161,16 @@ namespace CinematicDOF
 		fragment = UseAutoFocus ? lerp(tex2D(SamplerCDPreviousFocus, float2(0, 0)).r, ReShade::GetLinearizedDepth(AutoFocusPoint), AutoFocusTransitionSpeed) 
 								: (manualFocusPlaneValue / 1000);
 #else
+		float previousFocus = tex2D(SamplerCDPreviousFocus, float2(0, 0)).r;
 		float2 autoFocusPointToUse = UseMouseDrivenAutoFocus ? MouseCoords * BUFFER_PIXEL_SIZE : AutoFocusPoint;
-		fragment = UseAutoFocus ? lerp(tex2D(SamplerCDPreviousFocus, float2(0, 0)).r, ReShade::GetLinearizedDepth(autoFocusPointToUse), AutoFocusTransitionSpeed) 
-								: (ManualFocusPlane / 1000);
+		float newFocusTarget = ReShade::GetLinearizedDepth(autoFocusPointToUse);
+
+		if (newFocusTarget >= 0.999f)
+		{
+			newFocusTarget = previousFocus;
+		}
+
+		fragment = UseAutoFocus ? lerp(previousFocus, newFocusTarget, AutoFocusTransitionSpeed) : (ManualFocusPlane / 1000.0f);
 #endif
 	}